Solution to tournament in Bash

bash/tournament/tournament.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+
+declare -A matches_played wins draws losses points
+
+print_table_row() {
+    printf '%-30s | %2s | %2s | %2s | %2s | %2s\n' "$@"
+}
+
+print_table_row "Team" "MP" "W" "D" "L" "P"
+
+initialize_teams_stats() {
+	local team
+	for team in "$@"; do
+		: "${matches_played[$team]:=0}"
+		: "${wins[$team]:=0}"
+		: "${draws[$team]:=0}"
+		: "${losses[$team]:=0}"
+		: "${points[$team]:=0}"
+	done
+}
+
+initialize_teams_stats "$team1" "$team2"
+
+while IFS= read -r -t1 line; do
+    # Break loop if an empty line is encountered
+    [ -z "$line" ] && break
+
+    # Parse the input line
+    IFS=';' read -r team1 team2 outcome <<<"$line"
+
+    ((matches_played[$team1]++))
+    ((matches_played[$team2]++))
+
+    case "$outcome" in
+        "win")
+            ((wins[$team1]++))
+            ((losses[$team2]++))
+            ((points[$team1] += 3))
+            ;;
+        "draw")
+            ((draws[$team1]++))
+            ((draws[$team2]++))
+            ((points[$team1]++))
+            ((points[$team2]++))
+            ;;
+        "loss")
+            ((losses[$team1]++))
+            ((wins[$team2]++))
+            ((points[$team2] += 3))
+            ;;
+    esac
+# Read input from a file or standard input (stdin)
+done <"${1:-/dev/stdin}"
+
+# Iterate over teams and print their statistics, sorted by points
+for team in "${!matches_played[@]}"; do
+    print_table_row "$team" "${matches_played[$team]}" "${wins[$team]}" "${draws[$team]}" "${losses[$team]}" "${points[$team]}"
+# Sort the table by points in descending order, then alphabetically by team name
+done | sort -t'|' -k6nr,6 -k1,1